6mmBR or .243WSSM?

F

fields_mj

New member
Just sitting here drooling over the post on long range rigs, and day dreaming about how I wish I had one. I'm actually saving up to build, or have built (Probably by Dtech) a long range upper for my AR. I've narrowed my choices down to the .243WSSM and the 6mmBR. So what do you guys think? The only goal is long range accuracy.

Mark
 
I have a 243WSSM Custom, although I love this rifle I would have to agree with CatShooter.

Only because of the better brass.

Kapac
 
Thanks for the input. I figured the 6mmBR would be a better choice, but I wasn't sure if the added velocity of the WSSM would help minimize the effects of the wind at longer ranges.

Since I'll probably be getting 3000pcs of brass, I'd prefer to stick with brass that's commercially available.

Thanks,
Mark
 
I have the only 6BR upper built by Dtech so far. If you get one from him, you will be #2. He went out of his way to make sure it was a shooter. He knew I would be using it mostly for 600 yd. F Class shooting. You will love it.

Do you know how much 3000 rds. of 6BR brass will cost you? Good luck with that.

Jimmy
 
Why do you want 3000pcs of brass? /ubbthreads/images/graemlins/confused.gif

500 rounds with reloading, is plenty to wear out a barrel.

Jack
 
Quote:
Why do you want 3000pcs of brass? /ubbthreads/images/graemlins/confused.gif

500 rounds with reloading, is plenty to wear out a barrel.

Jack



If its a custom tight neck job it could be done with 100 rounds or less!

I was going to get about 500 rounds for my 6BR, till I turned 100 case necks, and that was it for me 100 will do!
 
Quote:
Quote:
Why do you want 3000pcs of brass? /ubbthreads/images/graemlins/confused.gif

500 rounds with reloading, is plenty to wear out a barrel.

Jack



If its a custom tight neck job it could be done with 100 rounds or less!

I was going to get about 500 rounds for my 6BR, till I turned 100 case necks, and that was it for me 100 will do!



I turned 1,100 pieces of Lapua 6mmBR brass for mine... it took a few weeks /ubbthreads/images/graemlins/frown.gif


.
 
I do all of my brass work after deer season during the winter. I hate brass work. I trim all my brass on my Dillon 650 using their case trimmer attachement. Then, after deburring, I run it back through the 650 again to prime it, and then charge and load one at a time on a Rock Chucker as needed.

I will use the rifle as a match rifle to shoot across the coarse, as well as a long range rifle out to 1000. It will start out as an F class just because I have a few extra scopes, but I don't have a set of match sights to go on it. Two or three practice sessions at the range, plus an 80 round regional match will eat up 500 pcs of brass in a hurry. I would consider 1500 pcs a minimum for this application. Maybe it would be good to get 1000 pcs of Remington brass for practice, and 500~1000 pcs of brass for "Match" ammo.

This project is still probably 3 years away, so I may not be #2 on the 6BR after all. It will take that long to save up enough for the upper, brass, and dies. I like to keep talking about to to feed the dream /ubbthreads/images/graemlins/smile.gif

Mark
 
I have a set of the very best match sights I no longer have any use for. I would part with them plus the carrying case at a reasonable price.

Jack
 
Is a tight neck a good option for an AR? I would have thought that it would cause some feed issues. Of course that opens up some other options. I could buy an even more reduced ammount of Lapua brass, and trim it all up and use it for long range only (feed one at a time), and then use cheaper brass for 300yds and under. Anyone have any thoughs on that?

You'll have to excuse my ignorance here. I've shot NRA highpower using a service rifle, but I've not shot a lot of matches so I never really dug into all the information on stuff. My RRA A2 upper made a really accurate service rifle out to 600yds, so I just stuck with that. I haven't shot in a match in a couple of years now, so the information is a little harder to come by. Rather than get the input from guys who are actually competing with the stuff, I have to settle for data from reloading books and picking peoples brains on-line.

Thanks,
Mark
 
I've noticed this "no turn neck" phrase used a lot more in the last year or two. What the heck is it????

Thanks again for your patience.
Mark
 
Quote:
I've noticed this "no turn neck" phrase used a lot more in the last year or two. What the heck is it????

Thanks again for your patience.
Mark



In a standard chamber there is typically ~0.008" of clearance around the loaded neck (~4 thou per side), and it varies depending on the reamer.

Accuracy guys used to have chambers cut that were a few thou smaller that a loaded round.

So if the bullet was 0.3000" and the case neck wall was 0.0100", then the loaded round would be 0.320". So they would have the chamber neck cut to (say) 0.318".

Then they would turn the neck walls down to 0.08" so the loaded round was now 0.316, leaving 0.002" clearance (0.001" on each side)

In one of my tight neck riffles, there is a 0.00075" clearance between the neck wall and the loaded neck (it is really tight!)

This was standard practice in all benchrest and match rifles until about ~8 years ago, and is still very common in PB benchrest.

But there are a lot of guys that are moving to "no turn necks.

The no turn neck (using the example above) would be cut at 0.0322", so the loaded round would give 0.002" clearance with new brass - it works well if you have a source of good brass (Lapua)...

... or are willing to sort your brass (Rem/chester) by neck wall concentricity - which is still easier than neck turning.

For shooters that need accuracy and a lot of loaded rounds like PD shooters, a no turn neck is a gift from God!!

After neck turning 1,100 cases for my last 6mmBR, I would NEVER build a tight neck rifle again!!!


.
 
Quote:
Quote:
I've noticed this "no turn neck" phrase used a lot more in the last year or two. What the heck is it????

Thanks again for your patience.
Mark





After neck turning 1,100 cases for my last 6mmBR, I would NEVER build a tight neck rifle again!!!


.


+1
i had a .262 neck BR and turned 100 cases by hand.....never even shot it and sold it for a .271 neck and it was well worth it in the saved labor....
 
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